You could make it so private citizens could bring criminal trials if the DA passes on them. This solves the DA and prosecution corruption problem where they are unwilling to prosecute for personal or career reasons.
Obviously there are risks to opening up the floodgates to private criminal prosecution, so you need restrictions and checks to avoid abuse by the wealthy and powerful. However, in some sense, the wealthy and powerful can already do that in the current system via access to the DAs, so it is not as much of a risk increase as it would seem.
The key here is figuring out a robust set of restrictions. Just to get ahead of the responses, I do not claim to have a comprehensive solution, so there is no point quibbling with me about how my proposal is incomplete. Take the problems you point out as areas of improvement and think about how they could be solved.
Obviously there are risks to opening up the floodgates to private criminal prosecution, so you need restrictions and checks to avoid abuse by the wealthy and powerful. However, in some sense, the wealthy and powerful can already do that in the current system via access to the DAs, so it is not as much of a risk increase as it would seem.
The key here is figuring out a robust set of restrictions. Just to get ahead of the responses, I do not claim to have a comprehensive solution, so there is no point quibbling with me about how my proposal is incomplete. Take the problems you point out as areas of improvement and think about how they could be solved.